Original subtitles

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Hello and welcome to this new tutorial.

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So in the previous tutorial we started to define our detect function which takes as input the grade

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that is the black and white image.

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And that same original image which is frame and we started to get the faces to apples which are not

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only the coordinates of the upper left corner of the rectangle that will detect the face but also the

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width and the height of these rectangles.

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So we got this things to detect Montell method.

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And now we're going to start a full loop that will iterate through these faces and for each of these

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faces we're going to draw a rectangle and we will detect some eyes.

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So let's start this for loop four and we're going to iterate through the faces and as we said faces

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are tables of four elements x and y which are the coordinates of the upper left corner of the rectangle

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detecting the face w which will be the width of the rectangle and H which will be the height of this

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rectangle.

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So for X Y W and H N then obviously faces because spaces contains exactly the Stupples of x y w an edge.

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So that's it that's the beginning of the follow up.

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And now we are ready to enter inside the loop to say what we want to do at each step.

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That is for each faces.

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So the first thing we want to do very simply is to draw the rectangle.

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And actually this is very simple that's why we're using Open City.

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We have a function for this which is the rectangle function very simply.

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So what we need to do what we simply need to do is take C-v to our opens the module then do that and

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then this rectangle function and this rectangle function takes several arguments.

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The first one is frame of course you know we want to specify on which image we want to draw the rectangle.

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Our ISO frame is our first argument and then we need to input several more arguments.

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The second one is the coordinates of the upper left corner of the rectangle and that we have it because

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that's exactly X and Y.

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So that second argument is exactly the couple of these coordinates x and y.

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So that's the second argument.

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Then the third argument is going to be the couple of coordinates of the lower right corner of the rectangle.

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And that we can get it by taking x plus w and y s h because W is the with and h is the height.

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So that gives us exactly the coordinates of the lower right corner of the rectangle.

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Then we need to pick a color for the rectangle.

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So that's going to be exactly our next argument.

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And you know to specify a color we need to use RGV code 255 0 0 and then for the X we'll pick a different

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color we'll pick for example green to zero here to Phi Phi here and 0.

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But anyway that's the fourth argument for the color.

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And then we need to put one last argument which is not very important bresh is going to be the thickness

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of the edges of the rectangles.

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So we're going to pick two is just in order to have some nice rectangles and that's very important that

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just for the form but two is a good choice.

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You will get some nice rectangles for the faces.

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All right so congratulations.

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We actually detected the faces draw the rectangles.

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Now we're going to do the same for the eyes.

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But as we said in the previous tutorial or tutorials before.

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Well we're going to do that in the referential of the face to save some computation time.

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So we will take care of these eyes in the next toils.

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And until then and joy can be division.